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2 Shets-Sheet 1.

(No Model.)

S. E. MOWER & T. FOWLER.

SAW MAKING MACHINE.

No. 337,977. Patnted Mar. 16, 18.86.

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'(No Model.) 1 2 Sheets- Sheet 2. S. E. MOWER & T. FOWLER.

SAW MAKING MAGHINE.

No. 337,977. Patented Mar. 16, 1886.

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UNITED STATES ATENT OFFICE.

SAMUEL E. MO\VER AND THADDEUS FONVLER, OF NE\V HAVEN, ASSIGNORS TO HENRYG. THOMPSON, OF MILFORD, AND HARRY G. THOMPSON, OF NEWV HAVEN, CONN, ANDARTHUR G. THOMPSON, OF NEW YORK, N. Y.

SAW-MAKING MACHINE.

SPECIFICATION forming part of Letters Patent No.'33'7,97'7, dated March16, 1886.

Serial No. 175,729. (No model.)

To all whom it may concern.-

Be it known that we, SAMUEL E. MOWER and THADDEUS FOWLER, both of NewHaven, county of New Haven, and State of Connectiout, have invented anImprovement in Saw- Making Machines, of which the following description,in connection with the accompanying drawings, is a specification, likeletters on the drawings representing like parts.

This invention has for its object the construction of a machine by whichto rapidly and economically produce saws from strips or bands of metal.

In ourimproved Inachinea strip or band fed into the machine isintermittingly acted upon by a tooth-cutting tool while supported firstat one and then at its other side by a die, and the teeth are cut andset singly, one after the other, the cut into the strip or band beingalternately from opposite sides thereof, and

substantially at right angles to the longitudinal center of the saidstrip or band, the latter being delivered from the machinefully toothed,ready to be cut into suitable lengths, and tempered for use. The stripor band is placed and fed longitudinally between two dies havingrecesses corresponding in shape and size with that of the pieces to becut from the strip, in order to leave teeth, and a part of 0 each of thesaid dies at one side the notch therein is beveled or inclined, in orderto permit the tooth being formed to be bent to one side or set, thecompletion of the cutting of each tooth also serving to set it.

The different parts of the machine are made adjustable to enable stripsor hands of different width and thickness to be operated upon for theproduction of saws, and by changing the tooth-cutting tool and dies andthelength of the feed-stroke the size of the teeth may be varied.

Our invention consists in a saw making machine containing as operativeelements dies to support at both sides the metal strip or 5 band to bemade into a saw, and a tooth-cutting tool adapted to be reeiprocated inapath substantially at right angles to the'longitudinal center of thestrip or band, the said tool cutting into the strip or band at alternatestrokes from opposite sides of the said strip or band.

Our invention also consists in asaw-making machine containing asoperative elements dies to support at both sides the metal strip or bandto be made into a saw, and a tooth-cutting tool adapted to bereciprocated in a path substantially at right angles to the longitudinalcenter of the strip or band, the said tool cutting the strip or band atalternate strokes from opposite sides of the strip or band, and afeeding mechanism to intermittingly move the strip or band past the diesand cuttingtool.

Our invention also consists in a die for a saw-making machine, the sameconsisting of a grooved block having one of its faces beveled to enablethe teeth to be set as they are cut, as will be described.

Other features of our invention will be hereinafter described andpointed out in the claims.

Figure 1 in side elevation, partially broken out, represents asaw-making machine em bodying ourinvention; Fig. 2,a front end elevationthereof; Fig. 3, a plan view below the dotted line w w, Fig. 1, with thestrip or band in place; Figs. 4 and 5, sectional details showing themanner of joining the lever and carriage of the tooth-cutting tool. Fig.6 is a detail showing the actuatingcam removed. Fig. 7 is a section ofFig. 1 in the dotted line 8 m,- Fig. 8, an enlarged end view of thedies; Fig. 9, a detail showing the dies in plan view, the saw beingomitted; Fig. 10, a side elevation of part of a saw; and Fig. 11 an edgeview of the toothed part, showingthe setin the teeth.

The frame-work is composedofa column, A, an upright, A, adependingleg,A", and atable, A The main shaft a, mounted insuitableboxes in the upright frame-work A and driven by a 0 belt on apulley, I), has fastened to it a cam or eccentric, B, and a cam-disk, O,thelatter being preferably shielded by a curb, A, and a cover-plate, Apartially broken outin Fig. 2. The dies d d, to support the metal stripor 5 band D to be toothed at one edge for use as a saw, and placed ingrooves in the table A and there held with their faces at the properdistance apart, that being according to the thickness of the band orstrip, by a wedge-like clamp, 71, held in place by adjusting-screws ahaving milled heads a the screws passing through springs 8 on which theclamp n rests, the springs lifting the clamp when permitted to do so bythe screws.

The dies d are composed of steel bars grooved longitudinally at m, theshape of each groove being the same as that of the pieces of metal to beremoved from the edge of the strip or band. That part of the face ofeach die which is beyond the said groove in the direction of the travelof the band or strip is beveled or inclined, as at a to enable theoffsetting or bending aside of each tooth as its point is beingcompleted, thus setting the teeth as they are completed. Thetooth-cutting tool 0, to co-operate with the said dies,which support thestrip or band D at both sides, is attached by screws 30 in a verticalgroove of an upright part, 0", of the carriage c, the latter being shownas of dovetail shape in cross-section, (see Figs. 1 and 5,) and fittedinto a groove of dovetail shape cut horizontally in the depending leg Aof the frame-work.

The upright part, 0 is provided with a faceplate, c, attached to it byscrews 31, the faceplate holding the screws 30, the rear side of theupright part a resting against the planed front face of the dependingleg A.

The carriage at one end is slotted, as at 20, (see Fig. 4,) to receivethe stud f, having a slabbed hub or collar, which fits the said slot.The hub or collar f 2 has extended through it an adjustingscrew, 0provided with a right-and-left thread, one end of the saidadjusting-screw entering the carriage and the other end the stud f. Whenin the desired position,the stud is fixed by the set-nut The stud f atits front end receives over it the lower end of the lever L, pivoted ate and provided with the roller or other stud d, which, extended throughthe slot 33 (see Fig. 2) in the plate A, enters the cam-groove in thecam-disk O, the rotation of the said cam-disk effecting thereciprocation of the carriage c and the movement of thetooth-cutting-tool backward and forward along the grooves m m of thedies, the said tool passing from the groove of one into the groove ofthe other die, and at such time cutting from the strip or band D,between the dies, a piece of metal to leave a tooth of the desired depthor shape, the tooth -cutting tool at alternate strokes cutting throughthe band or strip from opposite directions, the band or strip being fedlongitudinally during the interval between each stroke of the tool, thesame tooth-cutting tool cutting out a piece of metal at each successivestroke to the right and then to the left. The rotation of the screw 0enables the stroke of the tooth-cutting tool to be regulated withrelation to the center of the strip or band D.

The feeding mechanism for the strip or band D is shown as composed of aslide-block, E,

opposite sides walls 34 and 35, the former having an attached toothedwedge, 12. The stud 13 is surrounded by a toothed ring, 14., a spring,15, between the stud and the inner side of the ring normally acting tokeep the ring pressed into the narrowing space between the wedge andstrip D, as in Fig. 3, the periphery of the ring engaging the strip atthe point 25, and moving the said strip with the slide-block when thelatter is moved in the direction of the arrow thereon (see Fig. 3) bythe arm 1 of the lever L, pivoted at e, the other arm, 2, of the saidlever being slotted at 3 and joined by pin 4 to a link, 35, pivoted tothe lower end of the slide-rod F in the box, and provided'at its upperend with a head, 5, carrying a roller, 7", which is acted upon by thecam B, (see Fig; 1,) when it is desired to cause the slide-block andthedevices described to feed the band or strip forward, the length ofthe forward or effective stroke being regulated or determined by thescrew N, the inner end of which stops the slide-block E sooner or laterin its outward movement. 7

In Fig. l the adjustment of the screw N is such as to regulate ashortstroke for the feed, the roll 7 not rising to its full extent as the camretires, the spring S on the rod F remain; ing somewhat compressed. Asthe slide-block E is moved backward the backward movement of the stripor band with it is prevented by a ring, 16, on a fixed stud, 18,oo-operating with a fixed but toothed incline 17, the

ring 14, during the backward movement of the slide-bl0ck E and while thestrip or bandD is held by the ring 16, being forced toward the point ofthe incline by its contact with the strip.

For the production of saws having their teeth of uniform depth it isnecessary that the upper straight edge of the strip or band being fedpast the dies and punch should be kept against a gage, P, and herein'thesaid gage is held down by screws 38. The lower edge of the strip D isacted upon by a plunger, 12*, surrounded by a spring, 8, both placed ina sleeve, If, a nut, 21, being on the reduced rod 7c of the plunger tocontrol the movements.

In operation let it be assumed that the band or strip is placed betweenthe faces of the two dies, each die touching one side of the saidband orstrip. The intermitting feed of the band or strip is in the direction ofthe arrow, Fig. 10. The tooth-cutting tool at each stroke to the rightand to the left cuts from the band or strip a piece of metal to leaveaspace, 0,which outlines theinclined back of one tooth and the verticalface of the tooth next ahead of it, the back of the latter toothhavingbeen formed by provided with a stud, 13, and having at its IIO thetooth-cutting tool and die at the preceding coming firmly seated on thedie, the tool cuts through the metal, leaving the part constituting thepoints of the teeth, turned aside or set, as it is called,and as shownin Fig. 11.

Prior to our invention we are not aware that asaw has ever been made bypunching through a band or strip in one and thenin theoppositedirection, forming the back and front of two teeth at each stroke, eachcompleted tooth being set singly.

We claim- 1. In asaw-making machine, dies to support at both sides themetal strip or band to be made into a saw, combined with a tooth-cuttingtool adapted to be reciproeated in a path substantially at right anglesto the longitudinal eenter of the said strip or band, the said toolcutting into the band or strip from opposite sides thereof at alternatestrokes, each stroke of the tool forming the back of one tooth and thefront of the tooth nextahead of the tool in the direction of movement ofthe strip or band, substantially as described.

2. In asaw-making machine, dies to support at both sides the metal stripor band to be made into a saw,eombined with a tooth-cutting tool adaptedto be reciprocated in a path substantially at right angles to thelongitudinal center of the said strip or band, the said tool cuttinginto the band or strip from opposite sides thereof at alternate strokes,each stroke of the tool forming the back of one tooth and the front ofthe tooth next ahead of the tool in the direction of movement of thestrip or band,and a feeding mechanism to move the strip or bandintermittingly, substantially as described.

3. In asaw-makiug machine, the die provided with a groove for thetooth-cutting tool,and having its face beveled orinclined, as at a toenable one tooth to be set as the back of the next tooth is being cut,substantially as described.

4. In a saw-making machine, the two dies d d and the cutting-tool andits carriage, combined with the lever L, the cam to move it,and the studand adjustable screw to connect the lever and carriage, substantially asdescribed.

5. In a saw-making machine, the dies d d, slotted bed or table A and thegage-plate I combined with the plunger,to act upon one edge of the bandor strip and keep the other edge thereof against the gages,substantially as described.

In testimony whereof we have signed our names to this specification inthe presence of two subscribing witnesses.

SAMUEL E. MOYVER. THADDEUS FOYVLER.

\Vitnesses:

HENRY G. THOMPSON, TH. 13. CANNON.

